/*! iScroll v5.2.0-snapshot ~ (c) 2008-2017 Matteo Spinelli ~ http://cubiq.org/license */
(function (window, document, Math) {
    var rAF = window.requestAnimationFrame ||
        window.webkitRequestAnimationFrame ||
        window.mozRequestAnimationFrame ||
        window.oRequestAnimationFrame ||
        window.msRequestAnimationFrame ||
        function (callback) {
            window.setTimeout(callback, 1000 / 60);
        };

    var utils = (function () {
        var me = {};

        var _elementStyle = document.createElement('div').style;
        var _vendor = (function () {
            var vendors = ['t', 'webkitT', 'MozT', 'msT', 'OT'],
                transform,
                i = 0,
                l = vendors.length;

            for (; i < l; i++) {
                transform = vendors[i] + 'ransform';
                if (transform in _elementStyle) return vendors[i].substr(0, vendors[i].length - 1);
            }

            return false;
        })();

        function _prefixStyle(style) {
            if (_vendor === false) return false;
            if (_vendor === '') return style;
            return _vendor + style.charAt(0).toUpperCase() + style.substr(1);
        }

        me.getTime = Date.now || function getTime() {
            return new Date().getTime();
        };

        me.extend = function (target, obj) {
            for (var i in obj) {
                target[i] = obj[i];
            }
        };

        me.addEvent = function (el, type, fn, capture) {
            el.addEventListener(type, fn, !!capture);
        };

        me.removeEvent = function (el, type, fn, capture) {
            el.removeEventListener(type, fn, !!capture);
        };

        me.prefixPointerEvent = function (pointerEvent) {
            return window.MSPointerEvent ?
                'MSPointer' + pointerEvent.charAt(7).toUpperCase() + pointerEvent.substr(8) :
                pointerEvent;
        };

        me.momentum = function (current, start, time, lowerMargin, wrapperSize, deceleration) {
            var distance = current - start,
                speed = Math.abs(distance) / time,
                destination,
                duration;

            deceleration = deceleration === undefined ? 0.0006 : deceleration;

            destination = current + (speed * speed) / (2 * deceleration) * (distance < 0 ? -1 : 1);
            duration = speed / deceleration;

            if (destination < lowerMargin) {
                destination = wrapperSize ? lowerMargin - (wrapperSize / 2.5 * (speed / 8)) : lowerMargin;
                distance = Math.abs(destination - current);
                duration = distance / speed;
            } else if (destination > 0) {
                destination = wrapperSize ? wrapperSize / 2.5 * (speed / 8) : 0;
                distance = Math.abs(current) + destination;
                duration = distance / speed;
            }

            return {
                destination: Math.round(destination),
                duration: duration
            };
        };

        var _transform = _prefixStyle('transform');

        me.extend(me, {
            hasTransform: _transform !== false,
            hasPerspective: _prefixStyle('perspective') in _elementStyle,
            hasTouch: 'ontouchstart' in window,
            hasPointer: !!(window.PointerEvent || window.MSPointerEvent), // IE10 is prefixed
            hasTransition: _prefixStyle('transition') in _elementStyle
        });

        /*
        This should find all Android browsers lower than build 535.19 (both stock browser and webview)
        - galaxy S2 is ok
        - 2.3.6 : `AppleWebKit/533.1 (KHTML, like Gecko) Version/4.0 Mobile Safari/533.1`
        - 4.0.4 : `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S3 is badAndroid (stock brower, webview)
         `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S4 is badAndroid (stock brower, webview)
         `AppleWebKit/534.30 (KHTML, like Gecko) Version/4.0 Mobile Safari/534.30`
       - galaxy S5 is OK
         `AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
       - galaxy S6 is OK
         `AppleWebKit/537.36 (KHTML, like Gecko) Version/4.0 Mobile Safari/537.36 (Chrome/)`
      */
        me.isBadAndroid = (function () {
            var appVersion = window.navigator.appVersion;
            // Android browser is not a chrome browser.
            if (/Android/.test(appVersion) && !(/Chrome\/\d/.test(appVersion))) {
                var safariVersion = appVersion.match(/Safari\/(\d+.\d)/);
                if (safariVersion && typeof safariVersion === "object" && safariVersion.length >= 2) {
                    return parseFloat(safariVersion[1]) < 535.19;
                } else {
                    return true;
                }
            } else {
                return false;
            }
        })();

        me.extend(me.style = {}, {
            transform: _transform,
            transitionTimingFunction: _prefixStyle('transitionTimingFunction'),
            transitionDuration: _prefixStyle('transitionDuration'),
            transitionDelay: _prefixStyle('transitionDelay'),
            transformOrigin: _prefixStyle('transformOrigin'),
            touchAction: _prefixStyle('touchAction')
        });

        me.hasClass = function (e, c) {
            var re = new RegExp("(^|\\s)" + c + "(\\s|$)");
            return re.test(e.className);
        };

        me.addClass = function (e, c) {
            if (me.hasClass(e, c)) {
                return;
            }

            var newclass = e.className.split(' ');
            newclass.push(c);
            e.className = newclass.join(' ');
        };

        me.removeClass = function (e, c) {
            if (!me.hasClass(e, c)) {
                return;
            }

            var re = new RegExp("(^|\\s)" + c + "(\\s|$)", 'g');
            e.className = e.className.replace(re, ' ');
        };

        me.offset = function (el) {
            var left = -el.offsetLeft,
                top = -el.offsetTop;

            // jshint -W084
            while (el = el.offsetParent) {
                left -= el.offsetLeft;
                top -= el.offsetTop;
            }
            // jshint +W084

            return {
                left: left,
                top: top
            };
        };

        me.preventDefaultException = function (el, exceptions) {
            for (var i in exceptions) {
                if (exceptions[i].test(el[i])) {
                    return true;
                }
            }

            return false;
        };

        me.extend(me.eventType = {}, {
            touchstart: 1,
            touchmove: 1,
            touchend: 1,

            mousedown: 2,
            mousemove: 2,
            mouseup: 2,

            pointerdown: 3,
            pointermove: 3,
            pointerup: 3,

            MSPointerDown: 3,
            MSPointerMove: 3,
            MSPointerUp: 3
        });

        me.extend(me.ease = {}, {
            quadratic: {
                style: 'cubic-bezier(0.25, 0.46, 0.45, 0.94)',
                fn: function (k) {
                    return k * (2 - k);
                }
            },
            circular: {
                style: 'cubic-bezier(0.1, 0.57, 0.1, 1)',	// Not properly "circular" but this looks better, it should be (0.075, 0.82, 0.165, 1)
                fn: function (k) {
                    return Math.sqrt(1 - (--k * k));
                }
            },
            back: {
                style: 'cubic-bezier(0.175, 0.885, 0.32, 1.275)',
                fn: function (k) {
                    var b = 4;
                    return (k = k - 1) * k * ((b + 1) * k + b) + 1;
                }
            },
            bounce: {
                style: '',
                fn: function (k) {
                    if ((k /= 1) < (1 / 2.75)) {
                        return 7.5625 * k * k;
                    } else if (k < (2 / 2.75)) {
                        return 7.5625 * (k -= (1.5 / 2.75)) * k + 0.75;
                    } else if (k < (2.5 / 2.75)) {
                        return 7.5625 * (k -= (2.25 / 2.75)) * k + 0.9375;
                    } else {
                        return 7.5625 * (k -= (2.625 / 2.75)) * k + 0.984375;
                    }
                }
            },
            elastic: {
                style: '',
                fn: function (k) {
                    var f = 0.22,
                        e = 0.4;

                    if (k === 0) {
                        return 0;
                    }
                    if (k == 1) {
                        return 1;
                    }

                    return (e * Math.pow(2, -10 * k) * Math.sin((k - f / 4) * (2 * Math.PI) / f) + 1);
                }
            }
        });

        me.tap = function (e, eventName) {
            var ev = document.createEvent('Event');
            ev.initEvent(eventName, true, true);
            ev.pageX = e.pageX;
            ev.pageY = e.pageY;
            e.target.dispatchEvent(ev);
        };

        me.click = function (e) {
            var target = e.target,
                ev;

            if (!(/(SELECT|INPUT|TEXTAREA)/i).test(target.tagName)) {
                // https://developer.mozilla.org/en-US/docs/Web/API/MouseEvent/initMouseEvent
                // initMouseEvent is deprecated.
                ev = document.createEvent(window.MouseEvent ? 'MouseEvents' : 'Event');
                ev.initEvent('click', true, true);
                ev.view = e.view || window;
                ev.detail = 1;
                ev.screenX = target.screenX || 0;
                ev.screenY = target.screenY || 0;
                ev.clientX = target.clientX || 0;
                ev.clientY = target.clientY || 0;
                ev.ctrlKey = !!e.ctrlKey;
                ev.altKey = !!e.altKey;
                ev.shiftKey = !!e.shiftKey;
                ev.metaKey = !!e.metaKey;
                ev.button = 0;
                ev.relatedTarget = null;
                ev._constructed = true;
                target.dispatchEvent(ev);
            }
        };

        me.getTouchAction = function (eventPassthrough, addPinch) {
            var touchAction = 'none';
            if (eventPassthrough === 'vertical') {
                touchAction = 'pan-y';
            } else if (eventPassthrough === 'horizontal') {
                touchAction = 'pan-x';
            }
            if (addPinch && touchAction != 'none') {
                // add pinch-zoom support if the browser supports it, but if not (eg. Chrome <55) do nothing
                touchAction += ' pinch-zoom';
            }
            return touchAction;
        };

        me.getRect = function (el) {
            if (el instanceof SVGElement) {
                var rect = el.getBoundingClientRect();
                return {
                    top: rect.top,
                    left: rect.left,
                    width: rect.width,
                    height: rect.height
                };
            } else {
                return {
                    top: el.offsetTop,
                    left: el.offsetLeft,
                    width: el.offsetWidth,
                    height: el.offsetHeight
                };
            }
        };

        return me;
    })();

    function IScroll(el, options) {
        this.wrapper = typeof el == 'string' ? document.querySelector(el) : el;
        this.scroller = this.wrapper.children[0];
        this.scrollerStyle = this.scroller.style;		// cache style for better performance

        this.options = {

// INSERT POINT: OPTIONS
            disablePointer: !utils.hasPointer,
            disableTouch: utils.hasPointer || !utils.hasTouch,
            disableMouse: utils.hasPointer || utils.hasTouch,
            startX: 0,
            startY: 0,
            scrollY: true,
            directionLockThreshold: 5,
            momentum: true,

            bounce: true,
            bounceTime: 600,
            bounceEasing: '',

            preventDefault: true,
            preventDefaultException: {tagName: /^(INPUT|TEXTAREA|BUTTON|SELECT)$/},

            HWCompositing: true,
            useTransition: true,
            useTransform: true,
            bindToWrapper: typeof window.onmousedown === "undefined"
        };

        for (var i in options) {
            this.options[i] = options[i];
        }

        // Normalize options
        this.translateZ = this.options.HWCompositing && utils.hasPerspective ? ' translateZ(0)' : '';

        this.options.useTransition = utils.hasTransition && this.options.useTransition;
        this.options.useTransform = utils.hasTransform && this.options.useTransform;

        this.options.eventPassthrough = this.options.eventPassthrough === true ? 'vertical' : this.options.eventPassthrough;
        this.options.preventDefault = !this.options.eventPassthrough && this.options.preventDefault;

        // If you want eventPassthrough I have to lock one of the axes
        this.options.scrollY = this.options.eventPassthrough == 'vertical' ? false : this.options.scrollY;
        this.options.scrollX = this.options.eventPassthrough == 'horizontal' ? false : this.options.scrollX;

        // With eventPassthrough we also need lockDirection mechanism
        this.options.freeScroll = this.options.freeScroll && !this.options.eventPassthrough;
        this.options.directionLockThreshold = this.options.eventPassthrough ? 0 : this.options.directionLockThreshold;

        this.options.bounceEasing = typeof this.options.bounceEasing == 'string' ? utils.ease[this.options.bounceEasing] || utils.ease.circular : this.options.bounceEasing;

        this.options.resizePolling = this.options.resizePolling === undefined ? 60 : this.options.resizePolling;

        if (this.options.tap === true) {
            this.options.tap = 'tap';
        }

        // https://github.com/cubiq/iscroll/issues/1029
        if (!this.options.useTransition && !this.options.useTransform) {
            if (!(/relative|absolute/i).test(this.scrollerStyle.position)) {
                this.scrollerStyle.position = "relative";
            }
        }

// INSERT POINT: NORMALIZATION

        // Some defaults
        this.x = 0;
        this.y = 0;
        this.directionX = 0;
        this.directionY = 0;
        this._events = {};

// INSERT POINT: DEFAULTS

        this._init();
        this.refresh();

        this.scrollTo(this.options.startX, this.options.startY);
        this.enable();
    }

    IScroll.prototype = {
        version: '5.2.0-snapshot',

        _init: function () {
            this._initEvents();

// INSERT POINT: _init

        },

        destroy: function () {
            this._initEvents(true);
            clearTimeout(this.resizeTimeout);
            this.resizeTimeout = null;
            this._execEvent('destroy');
        },

        _transitionEnd: function (e) {
            if (e.target != this.scroller || !this.isInTransition) {
                return;
            }

            this._transitionTime();
            if (!this.resetPosition(this.options.bounceTime)) {
                this.isInTransition = false;
                this._execEvent('scrollEnd');
            }
        },

        _start: function (e) {
            // React to left mouse button only
            if (utils.eventType[e.type] != 1) {
                // for button property
                // http://unixpapa.com/js/mouse.html
                var button;
                if (!e.which) {
                    /* IE case */
                    button = (e.button < 2) ? 0 :
                        ((e.button == 4) ? 1 : 2);
                } else {
                    /* All others */
                    button = e.button;
                }
                if (button !== 0) {
                    return;
                }
            }

            if (!this.enabled || (this.initiated && utils.eventType[e.type] !== this.initiated)) {
                return;
            }

            if (this.options.preventDefault && !utils.isBadAndroid && !utils.preventDefaultException(e.target, this.options.preventDefaultException)) {
                e.preventDefault();
            }

            var point = e.touches ? e.touches[0] : e,
                pos;

            this.initiated = utils.eventType[e.type];
            this.moved = false;
            this.distX = 0;
            this.distY = 0;
            this.directionX = 0;
            this.directionY = 0;
            this.directionLocked = 0;

            this.startTime = utils.getTime();

            if (this.options.useTransition && this.isInTransition) {
                this._transitionTime();
                this.isInTransition = false;
                pos = this.getComputedPosition();
                this._translate(Math.round(pos.x), Math.round(pos.y));
                this._execEvent('scrollEnd');
            } else if (!this.options.useTransition && this.isAnimating) {
                this.isAnimating = false;
                this._execEvent('scrollEnd');
            }

            this.startX = this.x;
            this.startY = this.y;
            this.absStartX = this.x;
            this.absStartY = this.y;
            this.pointX = point.pageX;
            this.pointY = point.pageY;

            this._execEvent('beforeScrollStart');
        },

        _move: function (e) {
            if (!this.enabled || utils.eventType[e.type] !== this.initiated) {
                return;
            }

            if (this.options.preventDefault) {	// increases performance on Android? TODO: check!
                e.preventDefault();
            }

            var point = e.touches ? e.touches[0] : e,
                deltaX = point.pageX - this.pointX,
                deltaY = point.pageY - this.pointY,
                timestamp = utils.getTime(),
                newX, newY,
                absDistX, absDistY;

            this.pointX = point.pageX;
            this.pointY = point.pageY;

            this.distX += deltaX;
            this.distY += deltaY;
            absDistX = Math.abs(this.distX);
            absDistY = Math.abs(this.distY);

            // We need to move at least 10 pixels for the scrolling to initiate
            if (timestamp - this.endTime > 300 && (absDistX < 10 && absDistY < 10)) {
                return;
            }

            // If you are scrolling in one direction lock the other
            if (!this.directionLocked && !this.options.freeScroll) {
                if (absDistX > absDistY + this.options.directionLockThreshold) {
                    this.directionLocked = 'h';		// lock horizontally
                } else if (absDistY >= absDistX + this.options.directionLockThreshold) {
                    this.directionLocked = 'v';		// lock vertically
                } else {
                    this.directionLocked = 'n';		// no lock
                }
            }

            if (this.directionLocked == 'h') {
                if (this.options.eventPassthrough == 'vertical') {
                    e.preventDefault();
                } else if (this.options.eventPassthrough == 'horizontal') {
                    this.initiated = false;
                    return;
                }

                deltaY = 0;
            } else if (this.directionLocked == 'v') {
                if (this.options.eventPassthrough == 'horizontal') {
                    e.preventDefault();
                } else if (this.options.eventPassthrough == 'vertical') {
                    this.initiated = false;
                    return;
                }

                deltaX = 0;
            }

            deltaX = this.hasHorizontalScroll ? deltaX : 0;
            deltaY = this.hasVerticalScroll ? deltaY : 0;

            newX = this.x + deltaX;
            newY = this.y + deltaY;

            // Slow down if outside of the boundaries
            if (newX > 0 || newX < this.maxScrollX) {
                newX = this.options.bounce ? this.x + deltaX / 3 : newX > 0 ? 0 : this.maxScrollX;
            }
            if (newY > 0 || newY < this.maxScrollY) {
                newY = this.options.bounce ? this.y + deltaY / 3 : newY > 0 ? 0 : this.maxScrollY;
            }

            this.directionX = deltaX > 0 ? -1 : deltaX < 0 ? 1 : 0;
            this.directionY = deltaY > 0 ? -1 : deltaY < 0 ? 1 : 0;

            if (!this.moved) {
                this._execEvent('scrollStart');
            }

            this.moved = true;

            this._translate(newX, newY);

            /* REPLACE START: _move */

            if (timestamp - this.startTime > 300) {
                this.startTime = timestamp;
                this.startX = this.x;
                this.startY = this.y;
            }

            /* REPLACE END: _move */

        },

        _end: function (e) {
            if (!this.enabled || utils.eventType[e.type] !== this.initiated) {
                return;
            }

            if (this.options.preventDefault && !utils.preventDefaultException(e.target, this.options.preventDefaultException)) {
                e.preventDefault();
            }

            var point = e.changedTouches ? e.changedTouches[0] : e,
                momentumX,
                momentumY,
                duration = utils.getTime() - this.startTime,
                newX = Math.round(this.x),
                newY = Math.round(this.y),
                distanceX = Math.abs(newX - this.startX),
                distanceY = Math.abs(newY - this.startY),
                time = 0,
                easing = '';

            this.isInTransition = 0;
            this.initiated = 0;
            this.endTime = utils.getTime();

            // reset if we are outside of the boundaries
            if (this.resetPosition(this.options.bounceTime)) {
                return;
            }

            this.scrollTo(newX, newY);	// ensures that the last position is rounded

            // we scrolled less than 10 pixels
            if (!this.moved) {
                if (this.options.tap) {
                    utils.tap(e, this.options.tap);
                }

                if (this.options.click) {
                    utils.click(e);
                }

                this._execEvent('scrollCancel');
                return;
            }

            if (this._events.flick && duration < 200 && distanceX < 100 && distanceY < 100) {
                this._execEvent('flick');
                return;
            }

            // start momentum animation if needed
            if (this.options.momentum && duration < 300) {
                momentumX = this.hasHorizontalScroll ? utils.momentum(this.x, this.startX, duration, this.maxScrollX, this.options.bounce ? this.wrapperWidth : 0, this.options.deceleration) : {
                    destination: newX,
                    duration: 0
                };
                momentumY = this.hasVerticalScroll ? utils.momentum(this.y, this.startY, duration, this.maxScrollY, this.options.bounce ? this.wrapperHeight : 0, this.options.deceleration) : {
                    destination: newY,
                    duration: 0
                };
                newX = momentumX.destination;
                newY = momentumY.destination;
                time = Math.max(momentumX.duration, momentumY.duration);
                this.isInTransition = 1;
            }

// INSERT POINT: _end

            if (newX != this.x || newY != this.y) {
                // change easing function when scroller goes out of the boundaries
                if (newX > 0 || newX < this.maxScrollX || newY > 0 || newY < this.maxScrollY) {
                    easing = utils.ease.quadratic;
                }

                this.scrollTo(newX, newY, time, easing);
                return;
            }

            this._execEvent('scrollEnd');
        },

        _resize: function () {
            var that = this;

            clearTimeout(this.resizeTimeout);

            this.resizeTimeout = setTimeout(function () {
                that.refresh();
            }, this.options.resizePolling);
        },

        resetPosition: function (time) {
            var x = this.x,
                y = this.y;

            time = time || 0;

            if (!this.hasHorizontalScroll || this.x > 0) {
                x = 0;
            } else if (this.x < this.maxScrollX) {
                x = this.maxScrollX;
            }

            if (!this.hasVerticalScroll || this.y > 0) {
                y = 0;
            } else if (this.y < this.maxScrollY) {
                y = this.maxScrollY;
            }

            if (x == this.x && y == this.y) {
                return false;
            }

            this.scrollTo(x, y, time, this.options.bounceEasing);

            return true;
        },

        disable: function () {
            this.enabled = false;
        },

        enable: function () {
            this.enabled = true;
        },

        refresh: function () {
            utils.getRect(this.wrapper);		// Force reflow

            this.wrapperWidth = this.wrapper.clientWidth;
            this.wrapperHeight = this.wrapper.clientHeight;

            var rect = utils.getRect(this.scroller);
            /* REPLACE START: refresh */

            this.scrollerWidth = rect.width;
            this.scrollerHeight = rect.height;

            this.maxScrollX = this.wrapperWidth - this.scrollerWidth;
            this.maxScrollY = this.wrapperHeight - this.scrollerHeight;

            /* REPLACE END: refresh */

            this.hasHorizontalScroll = this.options.scrollX && this.maxScrollX < 0;
            this.hasVerticalScroll = this.options.scrollY && this.maxScrollY < 0;

            if (!this.hasHorizontalScroll) {
                this.maxScrollX = 0;
                this.scrollerWidth = this.wrapperWidth;
            }

            if (!this.hasVerticalScroll) {
                this.maxScrollY = 0;
                this.scrollerHeight = this.wrapperHeight;
            }

            this.endTime = 0;
            this.directionX = 0;
            this.directionY = 0;

            if (utils.hasPointer && !this.options.disablePointer) {
                // The wrapper should have `touchAction` property for using pointerEvent.
                this.wrapper.style[utils.style.touchAction] = utils.getTouchAction(this.options.eventPassthrough, true);

                // case. not support 'pinch-zoom'
                // https://github.com/cubiq/iscroll/issues/1118#issuecomment-270057583
                if (!this.wrapper.style[utils.style.touchAction]) {
                    this.wrapper.style[utils.style.touchAction] = utils.getTouchAction(this.options.eventPassthrough, false);
                }
            }
            this.wrapperOffset = utils.offset(this.wrapper);

            this._execEvent('refresh');

            this.resetPosition();

// INSERT POINT: _refresh

        },

        on: function (type, fn) {
            if (!this._events[type]) {
                this._events[type] = [];
            }

            this._events[type].push(fn);
        },

        off: function (type, fn) {
            if (!this._events[type]) {
                return;
            }

            var index = this._events[type].indexOf(fn);

            if (index > -1) {
                this._events[type].splice(index, 1);
            }
        },

        _execEvent: function (type) {
            if (!this._events[type]) {
                return;
            }

            var i = 0,
                l = this._events[type].length;

            if (!l) {
                return;
            }

            for (; i < l; i++) {
                this._events[type][i].apply(this, [].slice.call(arguments, 1));
            }
        },

        scrollBy: function (x, y, time, easing) {
            x = this.x + x;
            y = this.y + y;
            time = time || 0;

            this.scrollTo(x, y, time, easing);
        },

        scrollTo: function (x, y, time, easing) {
            easing = easing || utils.ease.circular;

            this.isInTransition = this.options.useTransition && time > 0;
            var transitionType = this.options.useTransition && easing.style;
            if (!time || transitionType) {
                if (transitionType) {
                    this._transitionTimingFunction(easing.style);
                    this._transitionTime(time);
                }
                this._translate(x, y);
            } else {
                this._animate(x, y, time, easing.fn);
            }
        },

        scrollToElement: function (el, time, offsetX, offsetY, easing) {
            el = el.nodeType ? el : this.scroller.querySelector(el);

            if (!el) {
                return;
            }

            var pos = utils.offset(el);

            pos.left -= this.wrapperOffset.left;
            pos.top -= this.wrapperOffset.top;

            // if offsetX/Y are true we center the element to the screen
            var elRect = utils.getRect(el);
            var wrapperRect = utils.getRect(this.wrapper);
            if (offsetX === true) {
                offsetX = Math.round(elRect.width / 2 - wrapperRect.width / 2);
            }
            if (offsetY === true) {
                offsetY = Math.round(elRect.height / 2 - wrapperRect.height / 2);
            }

            pos.left -= offsetX || 0;
            pos.top -= offsetY || 0;

            pos.left = pos.left > 0 ? 0 : pos.left < this.maxScrollX ? this.maxScrollX : pos.left;
            pos.top = pos.top > 0 ? 0 : pos.top < this.maxScrollY ? this.maxScrollY : pos.top;

            time = time === undefined || time === null || time === 'auto' ? Math.max(Math.abs(this.x - pos.left), Math.abs(this.y - pos.top)) : time;

            this.scrollTo(pos.left, pos.top, time, easing);
        },

        _transitionTime: function (time) {
            if (!this.options.useTransition) {
                return;
            }
            time = time || 0;
            var durationProp = utils.style.transitionDuration;
            if (!durationProp) {
                return;
            }

            this.scrollerStyle[durationProp] = time + 'ms';

            if (!time && utils.isBadAndroid) {
                this.scrollerStyle[durationProp] = '0.0001ms';
                // remove 0.0001ms
                var self = this;
                rAF(function () {
                    if (self.scrollerStyle[durationProp] === '0.0001ms') {
                        self.scrollerStyle[durationProp] = '0s';
                    }
                });
            }

// INSERT POINT: _transitionTime

        },

        _transitionTimingFunction: function (easing) {
            this.scrollerStyle[utils.style.transitionTimingFunction] = easing;

// INSERT POINT: _transitionTimingFunction

        },

        _translate: function (x, y) {
            if (this.options.useTransform) {

                /* REPLACE START: _translate */

                this.scrollerStyle[utils.style.transform] = 'translate(' + x + 'px,' + y + 'px)' + this.translateZ;

                /* REPLACE END: _translate */

            } else {
                x = Math.round(x);
                y = Math.round(y);
                this.scrollerStyle.left = x + 'px';
                this.scrollerStyle.top = y + 'px';
            }

            this.x = x;
            this.y = y;

// INSERT POINT: _translate

        },

        _initEvents: function (remove) {
            var eventType = remove ? utils.removeEvent : utils.addEvent,
                target = this.options.bindToWrapper ? this.wrapper : window;

            eventType(window, 'orientationchange', this);
            eventType(window, 'resize', this);

            if (this.options.click) {
                eventType(this.wrapper, 'click', this, true);
            }

            if (!this.options.disableMouse) {
                eventType(this.wrapper, 'mousedown', this);
                eventType(target, 'mousemove', this);
                eventType(target, 'mousecancel', this);
                eventType(target, 'mouseup', this);
            }

            if (utils.hasPointer && !this.options.disablePointer) {
                eventType(this.wrapper, utils.prefixPointerEvent('pointerdown'), this);
                eventType(target, utils.prefixPointerEvent('pointermove'), this);
                eventType(target, utils.prefixPointerEvent('pointercancel'), this);
                eventType(target, utils.prefixPointerEvent('pointerup'), this);
            }

            if (utils.hasTouch && !this.options.disableTouch) {
                eventType(this.wrapper, 'touchstart', this);
                eventType(target, 'touchmove', this);
                eventType(target, 'touchcancel', this);
                eventType(target, 'touchend', this);
            }

            eventType(this.scroller, 'transitionend', this);
            eventType(this.scroller, 'webkitTransitionEnd', this);
            eventType(this.scroller, 'oTransitionEnd', this);
            eventType(this.scroller, 'MSTransitionEnd', this);
        },

        getComputedPosition: function () {
            var matrix = window.getComputedStyle(this.scroller, null),
                x, y;

            if (this.options.useTransform) {
                matrix = matrix[utils.style.transform].split(')')[0].split(', ');
                x = +(matrix[12] || matrix[4]);
                y = +(matrix[13] || matrix[5]);
            } else {
                x = +matrix.left.replace(/[^-\d.]/g, '');
                y = +matrix.top.replace(/[^-\d.]/g, '');
            }

            return {x: x, y: y};
        },
        _animate: function (destX, destY, duration, easingFn) {
            var that = this,
                startX = this.x,
                startY = this.y,
                startTime = utils.getTime(),
                destTime = startTime + duration;

            function step() {
                var now = utils.getTime(),
                    newX, newY,
                    easing;

                if (now >= destTime) {
                    that.isAnimating = false;
                    that._translate(destX, destY);

                    if (!that.resetPosition(that.options.bounceTime)) {
                        that._execEvent('scrollEnd');
                    }

                    return;
                }

                now = (now - startTime) / duration;
                easing = easingFn(now);
                newX = (destX - startX) * easing + startX;
                newY = (destY - startY) * easing + startY;
                that._translate(newX, newY);

                if (that.isAnimating) {
                    rAF(step);
                }
            }

            this.isAnimating = true;
            step();
        },
        handleEvent: function (e) {
            switch (e.type) {
                case 'touchstart':
                case 'pointerdown':
                case 'MSPointerDown':
                case 'mousedown':
                    this._start(e);
                    break;
                case 'touchmove':
                case 'pointermove':
                case 'MSPointerMove':
                case 'mousemove':
                    this._move(e);
                    break;
                case 'touchend':
                case 'pointerup':
                case 'MSPointerUp':
                case 'mouseup':
                case 'touchcancel':
                case 'pointercancel':
                case 'MSPointerCancel':
                case 'mousecancel':
                    this._end(e);
                    break;
                case 'orientationchange':
                case 'resize':
                    this._resize();
                    break;
                case 'transitionend':
                case 'webkitTransitionEnd':
                case 'oTransitionEnd':
                case 'MSTransitionEnd':
                    this._transitionEnd(e);
                    break;
                case 'wheel':
                case 'DOMMouseScroll':
                case 'mousewheel':
                    this._wheel(e);
                    break;
                case 'keydown':
                    this._key(e);
                    break;
                case 'click':
                    if (this.enabled && !e._constructed) {
                        e.preventDefault();
                        e.stopPropagation();
                    }
                    break;
            }
        }
    };
    IScroll.utils = utils;

    if (typeof module != 'undefined' && module.exports) {
        module.exports = IScroll;
    } else if (typeof define == 'function' && define.amd) {
        define(function () {
            return IScroll;
        });
    } else {
        window.IScroll = IScroll;
    }

})(window, document, Math);
/**
 * [TagNav 可以滚动的标签导航]
 * 依赖Zepto、iScroll
 * @Author: 14100377
 * @param {String} type  自滚动类型 scrollToFirst/scrollToNext/simple
 * @param {String} curClassName  当前选中的类名 scrollToFirst/scrollToNext/simple
 * @param {Number} index  默认索引
 */
;(function (root, factory, d) {
    if (typeof module !== 'undefined' && module.exports) { // CommonJS
        module.exports = factory(root, d);
    } else if (typeof define === 'function' && define.amd) { // AMD / RequireJS
        define(factory(root, d));
    } else {
        root.TagNav = factory.call(root, root, d);
    }
})(this, function (w, d) {
    'use strict';
    //Event Hub
    var hub = (function () {
        var topics = {};
        return {
            subscribe: function (topic, listener) {
                if (!topics[topic]) topics[topic] = {queue: []};
                var index = topics[topic].queue.push(listener) - 1;
                return (function (topic, index) {
                    return {
                        remove: function () {
                            delete topics[topic].queue[index];
                        }
                    }
                })(topic, index);
            },
            publish: function (topic, info) {
                if (!topics[topic] || !topics[topic].queue.length) return;
                var items = topics[topic].queue;
                for (var i = 0, len = items.length; i < len; i++) {
                    if (typeof items[i] === 'function') items[i](info || {});
                }
            }
        };
    })();

    function TagNav(element, opts) {
        return (this instanceof TagNav)
            ? this._init(element, opts)
            : new TagNav(element, opts);
    }

    TagNav.prototype = {
        constructor: TagNav,

        _init: function (element, opts) {
            var self = this,
                $el = $(element),
                $list = $el.find('ul').first(),
                $items = $el.find('li');

            self.el = element;
            self.opts = opts || {};
            self.type = this.opts.type || 'simple';
            self.curClassName = self.opts.curClassName || 'weui-state-active';
            self.index = self.opts.index;

            self.iScroll = new IScroll(self.el, {
                scrollX: true,
                scrollY: false,
                click: true
            });

            if (self.index === undefined) {
                //TODO:优先从配置还是dom里取呢
                self.index = self.index || $list.find('.' + self.curClassName).index();
                if (self.index < 0) self.index = 0;
            }

            switch (this.opts.type) {
                case 'scrollToFirst' :
                    self._scrollToFirstEvent();
                    break;
                case 'scrollToNext' :
                    self._scrollToNextEvent();
                    break;
            }

            $items.on('click', function (e) {
                self.switchTo($(this).index(), e);
            });

            self.$list = $list;
            self.$items = $items;
            self.switchTo(self.index);
        },

        _scrollToFirstEvent: function () {
            var self = this;
            hub.subscribe('select', function (parms) {
                var el = self.$items.eq(parms.index)[0];
                setTimeout(function () {
                    self.iScroll.scrollToElement(el, 400)
                }, 180)
            });
        },

        _scrollToNextEvent: function () {
            var self = this,
                prevIndex;

            hub.subscribe('select', function (parms) {
                // 第一调用的时候没有prevIndex, 固根据this.index来控制方向。
                if (prevIndex === undefined) {
                    prevIndex = self.index ? 0 : 1;
                }
                var dir = parms.index > prevIndex,
                    // 如果是想左则找prev否则找next
                    target = self.$items.eq(parms.index)[dir ? 'next' : 'prev'](),
                    // 如果没有相邻的，自己的位置也需要检测。存在这种情况
                    // 被点击的按钮，只显示了一半
                    offset = target.offset() || self.$items.eq(parms.index).offset(),
                    within = $(self.el).offset(),
                    listOffset;

                if (dir ? offset.left + offset.width > within.left +
                    within.width : offset.left < within.left) {
                    listOffset = self.$list.offset();
                    var x = dir ? within.width - offset.left + listOffset.left - offset.width : listOffset.left - offset.left;
                    setTimeout(function () {
                        self.iScroll.scrollTo(x, 0, 400)
                    }, 180)
                }
                prevIndex = parms.index;
            });
        },

        /**
         * 选择
         * @method switchTo
         */
        switchTo: function (index, e) {
            var self = this,
                cur;

            cur = self.$items.removeClass(self.curClassName)
                .eq(index)
                .addClass(self.curClassName);

            self.index = index;
            hub.publish('select', {'index': index});
        },

        /**
         * 取消选择
         * @method unselect
         */
        unselect: function () {
            this.index = -1;
            this.$items.removeClass(self.curClassName);
        },

        /**
         * 获取当前选中的序号
         * @method getIndex
         */
        getIndex: function () {
            return this.index;
        }
    }
    return TagNav;

}, document);